"""Regression coverage for partial Telegram overflow delivery."""

from types import SimpleNamespace
from unittest.mock import AsyncMock, MagicMock

import pytest

from gateway.config import PlatformConfig
from gateway.platforms.base import SendResult
from plugins.platforms.telegram.adapter import TelegramAdapter
from gateway.stream_consumer import GatewayStreamConsumer


def _message(message_id: int | str) -> SimpleNamespace:
    return SimpleNamespace(message_id=message_id)


@pytest.fixture
def telegram_adapter() -> TelegramAdapter:
    adapter = TelegramAdapter(PlatformConfig(enabled=True, token="fake-token"))
    adapter._bot = MagicMock()
    object.__setattr__(adapter, "MAX_MESSAGE_LENGTH", 160)
    return adapter


@pytest.mark.asyncio
async def test_edit_overflow_split_reports_later_partial_failure_after_some_continuations_land(telegram_adapter):
    """Partial metadata tracks the last delivered continuation before failure."""
    content = "word " * 120
    telegram_adapter._bot.edit_message_text = AsyncMock(return_value=True)
    telegram_adapter._bot.send_message = AsyncMock(
        side_effect=[
            _message(202),
            RuntimeError("telegram send failed"),
            RuntimeError("telegram send failed"),
        ]
    )

    result = await telegram_adapter._edit_overflow_split(
        "12345", "201", content, finalize=False, metadata={"thread_id": "77"}
    )

    assert result.success is False
    assert result.message_id == "202"
    assert result.raw_response["partial_overflow"] is True
    assert result.raw_response["delivered_chunks"] == 2
    assert result.raw_response["last_message_id"] == "202"
    assert result.continuation_message_ids == ("202",)